Automatic sprinkler.



W-. B. HAMMOND.

AUTOMATIC SPRlNKLER. A-PPL-IGATION min OCT. I9. 1915.

; i sata- Ea parame- WILBERFORGE BEECHER HAMMOND, Oil? BOSTDN, TIKASSACH'USETTS, ASSIGNOE, BY

' -MESNE ASSIGNMENTS, T0. COMBINED HEAT AND SPRINKLER COMPANY, it. COTE-=- POBATION or MASSACHUSETTS.

AUTOMATIC SPRINKLER.

Specification of Letters Patent.

. lPatented June 5, 188W.

Application filed OctoberlS, 1915. Serial at. am.

.To all whom it may concern:

Be it known that I, Wrnnnnronon BEECHER HAMMoND, citizen of the United States, and resident of Boston, in the county'of Sufiolk and State of Massachusetts, have invented new and useful Improvements in Automatic nected to'the piping of a hot water heating:

system, and so constructed that the heatsensitive fusible member will be kept at a.

safely low temperature notwithstanding that the sprinkler head itself is intimately connected with a piping system in'which the water is at a temperature higher than that designed to soften the sensitive element and release the sprinkler. The invention consists further in the novel, effective and economical construction of the toggle-lever members. hereinafter described.-

In the accompanying drawings which illustrate the invention, I

Figure-1 shows sprinkler head partly in side elevation and partly in section;

Fig. 2,is a perspective view of one ofthe toggle-lever members;

Fig. 3 is a perspectiveview of 'the other. toggle-lever member;

Fig. 4; is a detail in side elevation illustrating a modification; I

Fig. 5 is a perspective View of one of the toggle-lever members shown in Fig. 4; and Fig. 6 is a perspective view of the other toggle-lever member shown in Fig. 4.

The type of sprinkler head used for the purpose of illustration. is the Grinnell sprinkler, but the invention is also applicable to'other types of sprinklers employing toggle systems held underrestraint by the heatsensi'tive fusible member whichis characteristic of all such sprinkler heads.

, Referring to Figs. 1,2 add 3of the draw ings, A. is the base of the sprinkler head, which is connected to the piping of the hot waterhea-ting system. B is the frame, C is the valve, 'and D is the abutment for the toggle members "opposite the valve. These parts may be of any'usual or preferred construction.

The valve 0 is normally and firmly pressed upon its seat by the toggle -lever members T, T which are held in position.

by'their lever arms and a heat sensitive'fusible link.- Said toggle'lever members are preferably made of sheet material, the blanks" for which are stamped out and then .bent'into the forms shown.

The member T is bent to form the short toggle Part 15 and the lever supporting part t arranged at an angle-to each other to provide a. shoulder 26 for engaging and holding the end of the other member T The lever arm 15 is ben-tup from one side of the part it at a slightly acute angle thereto.

The other toggle-lever member consists of the relatively long toggle part i and the lever arm i bent up from the side of part 12* at a slightly acute angle thereto.

The acute angled bends of the lever arms bring the two notches n and n, which hold the fusible link into substantially the same plane as the toggle points 32, 10 thus avoid ing any twisting strain when the parts assembled.

The sensitive link E may be of usual con struction, and as herein shown consists of two plates of copper or other suitable material, soldered together with some readily fusible metal.

The arms t and t are preferably provided with perforations or otherwise made of openwork structure, to provide relativel largerad atmg surfaces, and small cross sections, so that the heat conducted from the,

hot water iiin s stem and throu h the a 1 D p sprinkler head will oe d ssipated before reaching the sensitive fusible member ll.

Instead of retainin the to ie-lever mem bers in position by a link E under tensionto prevent the release of the sprinkler head by swinging the arms apart, the toggle-lever members may be so constructed as to release the sprinkler head by the swinging of the arms toward each other, in which case they will be retained in position by a heat sensitive strut. Such modification is illustrated in Figs. 4 and 6, wherein one toggle-lever member T has the'short toggle part 3, the lever supporting part 27 arranged at an angle to form a shoulder :5 and the lever arm t bent up at a slightly acute angle to the part 6 The other toggle-lever member consists of A st ut E, of any suitable construction adapted to collapse in the presence of heat,

engages notches in the lever arms t and 25 to hold. the toggle lever members in operative position.

I claim:

1. In an automatic sprinkler of the character described, a pair of valve holding toggle lever members, each integrally formed of sheet metal, one bent tion bent at an angle to said toggle portion,

I and a laterally extending lever arm bent up from one side of said arm supporting portion, and the other member bent to form 'a relatively long toggleportion, which ento form a relatively short toggle portion, an arm supporting porgages said shoulder,'and a lever-arm extend.,-.. 4

mg from one side of said toggle portion.

' 2. In an automatic sprinkler of theehan tionbent at an angle to saidtoggle portion,

and a laterally extending-lever arm bent up from oneside of said arm supportin tion, and-the othermember bent to orm'a' pOP- relatively long toggle portion,which engages said shoulder, and a lever. arm extending from one side of said toggle portion, both of said lever arms being anopen work and heat dispersinggstructure;

Signed vby me at Boston, this 16th day of October, 1915.

' WILBERFORGE BEEGHEE HAMMOND.

' Washington, D. 0.

Massachusetts,

perforated to provide Copies of this patent may be obtained for flve cents each, by addressing the .Gqmmissioner 'ofl 'iatents. 3 

